Whooping crane restoration
Olsen, Glenn H. Patuxent Wildlife Research Center, United States Geological Survey, Laurel, Maryland.
- Whooping crane protection
- Captive breeding and reintroduction efforts
- Additional Readings
Whooping cranes (Grus americana) [Figs. 1 and 2] are the rarest, most endangered cranes in the world. They numbered only 22 birds in 1937, and their breeding grounds were not discovered until 1954. The status of the whooping crane population was instrumental in the enactment of the Endangered Species Act of 1973 in the United States. From these low numbers in the 1930s and 1940s, conservation and captive breeding efforts have increased their numbers to more than 550 whooping cranes today. Half of these whooping cranes are in the historic wild flock that migrates between the Texas Gulf Coast (in the United States) and northern Alberta (in Canada).
The content above is only an excerpt.
for your institution. Subscribe
to your librarian. Recommend
AccessScience provides the most accurate and trustworthy scientific information available.
115,000-PLUS definitions from the McGraw-Hill Dictionary of Scientific and Technical Terms
3000 biographies of notable scientific figures
MORE THAN 17,000 downloadable images and animations illustrating key topics
ENGAGING VIDEOS highlighting the life and work of award-winning scientists